Tool for preparing and applying wires to terminals



May 12, 1959 R .1B. SHULTERS ETAL TOOL FOR PREPARING AND APPLYING WIRESTO TERMINALS F led. April 18 1955.

3 Sheets-Sheet 1 May 12, 1959 R. B. SHULTERS ETAL 2,885,764

TOOL. FOR PREPARING AND APPLYING WIRES TO TERMINALS Filed April 18, 19553 Sheets-Sheet 2 Z J17. JJ-Z/r/ JZZZTS Z0 jv oer faa ZZ'rs Z/ 5015' icrrc/e 9s May 1959 R. B. SHULTER'S ET AL 2,885,764

TOOL FOR PREPARING AND APPLYING WIRES TO TERMINALS Filed April 1a, 1955Y 3 Sheets-Sheet 5 Q7- 9 w Ml? Z5 IWIIIIIIIII zaa ftg 51w 66219 5 6, w IJ 5 6 j, @501 /mg d 0% S at s .Application'April is, 1955, Serial No.501,968 9 Claims. (01.29-33) The present invention relates generally tomaking a connection between a wire and an electrical terminal and moreparticularly to a tool for effecting such a connection by winding thewire in successive convolutions about andin intimate engagement with theterminal.

Tools of this general character conventionally include a rotary shaft orbit which is disposed within a guide or sleeve, the bit being providedat its forward end with a longitudinal recess for the reception of theterminal and a radially offset longitudinal groove for the reception ofthewire. Infthe operation of the tool the bit is rotated and the Wire iswound about the terminal, the wire being withdrawn longitudinally fromthe groove as it is applied to the terminal. By way of an example ofsuch a tool,

reference is made to United States Patent No. 2,585,010 issued February12, 1952, to Bell Telephone Laboratories, Incorporated, as assignee ofC. N. Hickman, et al.

In tools of the type shown in the afore-mentioned patent theexternalsleeve coactswith the bit so that the wire receiving groove in the bitis closed ,by the contiguous surface of the sleeve and only the forwardend of the grooveis accessible for the reception of the end of a wire,therein. Further, the wire must have been previously skinned or strippedofits insulation since the groove is sized in accordance with thediameter of the wire, i.e., the bare conductor. With such tools experi-*ence has shown that the necessityfor pres tripping is limiting upon theusability of these tools and the stripping operation and the operationcomprising the actual insertion of wires into the wire receiving grooveis a rela tively delicate and time consuming undertaking.

Fig. 2 is a perspective view of the forward end portion of the toolshown in Fig. 1 with the components illustrated in normal or loadingposition.

Fig. "3 is a front end elevation of the forward end portion of the toolshown in Fig. 2.

Fig. 4 is alongitudinal section taken substantially in the plane of line4-4 in Fig. 3.

Fig. 5 is a longitudinal section taken in offset planes as indicated bythe line 55 in Fig. 4. p

Fig. 6 is a perspective view similar to Fig. 2 but illustratingcomponent relationship immediately succeeding cutting operation. v

Figs. 7, 8, 9 and 10, :are a series 'of fragmentary longi-'tudinalsections similar to Fig. 4 illustrating thevarious componentrelationships succeeding the cutting operation and including thepositioning of the Wire to be applied to the terminal, the removal ofthe insulation therefrom," and the initiation of .the applicationthereof to a terminal. r Fig. 11 is a central longitudinalsectionsimilar. to Fig.

4 but showing the components of the forward end of the illustrative toolin condition for applying a wire to a terminal. V i

Fig. 12 is a transverse section taken substantially in the plane of line12-12 in Fig. 11. r

Fig. 13 is a plan view of the front end portion of the tools bit andsleeve. 1

While the invention is susceptible of various modifications andalternative constructions there is shown in the drawings and will hereinbe described in detail one presently preferred embodiment, but it is tobe understood 'thatit is not thereby intended to limit the invention tothe specific form disclosed, but on the contrary it is intended to coverall modifications and alternative constructions falling within thespirit and scope of the invention as expressed in the appended claims;

Referring more particularly to the drawings, there is shown in Fig. lapower operated'tool for elfectinga connection between -a wire and aterminal. In general, this'illustrative tool includes a body 10 which isequipped with a pistol-grip type handle 12 mounting a triggerlike fingerpiece 14 by means of which power suppliedto-the It is an object of thepresent invention, therefore to" provide an improved tool for connectingwires to terminals which is elfective not only to make the actualconnection butfin addition is capable of receiving wire as it issupplied fro m a supply spool or the like, and to'prepare the wire forthe connecting operation. p

(A more particular object lies in the provision inatool able cable 16attached to-thetool at the base of the" tool is'controlled.Theexemplarytool is adapted for electrical operation and suflice it tosay for present purposes it incorporates within the body 10 a rotaryelecf tric motor to which power is supplied by way ofasuithandle 12. Thefinger piece 14 is operatively 'associatedwith a switch (not shown)disposed within the handle 12 1 At its forward end the tool terminatesin a nose as-j;

ofthe aforesaid general character of anirnproved construction andarrangement facilitating the reception of an insulatedwire, cutting itto a predetermined length, stripping the desired amount ofinsulationflierefromand forming a connection of the wire thus receivedand prepared with a terminal.

A further object of the invention is to provide a tool which effectivelyreceives, prepares and applies a wire to a terminal, and at the sametime is of minimum nose or tip dimension permitting use in places wherespace is at a premium, which is so constructed and arranged as tominimize the danger of damage to the wire, as by nicking or the like,and which permits of economical manufacture.

sembly, generally designated 18, which includes a wire winding bit '20disposed within a forward projecting sleeve 21and whichmayincorporatesuitable speed re- 3 duction'gearing and clutch mechanism-forcoupling 'the' .tools motor to the bit 20.

As'c'an be" seen in the drawings, for example in' Figs. 3, 4, l0 and 11;the bit 20 is provided with a longitudinalrccess 22 for thereceptionof-a terminal Tabout-which a wire'W is tobe -wound in contiguous helicalconvolu tions so as to effect an electrical connection therebe-' Theobjects of the invention thus generally set forth together with otherobjects and ancillary advantages are attained by the construction andarrangement shown by way of. illustration in the accompanying drawings,in

which: 1

Figure 1 is a side elevation of a power operated tool embodying thefeaturesnfthe-present invention.

inradially offset relation to the recess 22, extending lon- Igitudinally in the peripheral surface of the bit. In operation the wireW is withdrawn from the groove 24 as it is wound about and in intimateengagement with the 1 terminaLT received'inthe recess22. 2

. Intaccordancewith the present invention the illustr' .Fatented May2,1959 3 tive tool incorporates an improved construction and arrangementof components facilitating the reception of the wire with its insulationin place thereon just as it is supplied from .a supply spool or thelike, and by means of theimproved construction and arrangement the wire.5 is cut to a predetermined length, is stripped of a predetermined.amount .of l insulation, and is positioned .automatically in the Wirereceiving groove 24 for subsequent application .to .a terminal receivedin the recess 22 of the bit 20.

Inaccordance-with one aspect of the invention the bit and the sleeve 21are especially formed to permit side loading ofthe wire-W, asdistinguished from axial insertion thereof as in priortools Moreparticularly,... the bit and sleeve are constructed and arranged so that.15 the :wire W can be loaded into the tool by. simply laying itacrossmtherbit subsequent manipulation of the componentsof thetoolcausing the..wire-to be prepared and automatically positioned in the.wire receiving groovep24 of the bit 20 for application to the terminalI. ,Thus -in-20 the. illustrative tool, the sleeve 21 ,is-mounted .forrela-.\. tive longitudinal movement with respect to the bit 20 betweenanormallyopenorloading positionrand a forward position wherein thecontiguous innersurface of the sleeve closes-the wire receivinggroove.24-to retain/ the wire W therein. Intermediate its ends thebitis/ relieved. asat 26 .to expose the rear .endof,the,.-wire,receiving groove 24 and is provided atone side of thisre-. lieved portion with a wire positioning surface 27 for guiding awire laid across the relieved apportion thereof toward the wirereceiving groove 24. Inthe'loading position of the sleeve (Fig- 2) theforward .end portion of thebit is exposed so that the wire W can be laidacrossthe surface 26. Upon relative forward movement. of .the sleeve 21with respect to the bit 20, theforward 35 end of the sleeve, asindicated at 28; moves the wire W forwardly toward the bits guidesurface 27. Continued forward motion of the sleeve relative to the bitcauses g the wire to be directed outwardly along the guide surface 27and towardthe wire receiving groove 24.v This 40 operation willbeapparent from Fig. 7. It-willalsobe seen that movement of the wireoutwardly along the guide surface 27 of the bit 20 by the forward end28ofthe sleeve 21 also results incircumferential movement of.the Wire'Wwith respectto the sleeve. To furtherfacilitate positioning of the wireW with respect to the groove 24, the sleeve may be provided with anadditional guide surface, here shownin the form-of anotch 29.- The notchis disposed in alined relation with the -wire receiving groove 24 ofthebit 20- and is thus positioned for engagement of the wire when it hasreached the outermost limit of the bit-guide surface 27 so as to retainthewire-in-alinement with" the groove 24. It will alsobe seen thatfurther 'forward movement of the'sleeve 21 with respect to the bitautomatically -directsethe wire 55 alongthegroove'24. 1

Means-is provided for 'movingthe'sleeve 24 longi-w tudinally withrespect-to the bit 20 between its rearmostf or. loading position-(Fig.2), andits*ful1y forwardforoperating position (Fig. 11). Inthepresent.instance,. .30 manually" operable means has been provided for;this purpose though it will be readily-apparent toone-ski'lled, intheart that a tool of this character-;canincorporate; power. actuatedmeans forthis-purpose. As shown, the nose assernbly 18 isequipped with acollar 30 mounting 5 a stationary arm 32. A lever- 34 is pivoted.;intermedia te its" ends, as at--35,- on'theouter'end of the arm; 32. VThe: upper end 3411 of-the lever-34 isreceived-in a peripheral channel36 formedadjacent the-rear end" of f the sleeve; 21.- To permitrelative-=movementlbetween the-"16Vel;I 70 end 34a and'the sleeve" 21:in the. channel 36the1'endl- 34ais :rounded and adjacent theendr34i1the-lever 34:187. necked j down. This construction: and.*arranger'nent'- permits free fore and aft, rocking movement: ofrtlrierle'veraabcut-rthe pivotcwwhich:movementisimilarlysproduces 75 :ofthe apertures 54.

forward and rearward movement of the sleeve 21 with respect to the bit20; To produce such movementof the lever 34 its lower end is connectedby means of a link 38 to a finger piece 40. At its upper end the fingerpiece 40 is pivotally connected at 41 to the body 10. The lower end ofthe finger piece 40 is formed and disposed for convenient manipulationby the fingers of an operator holding the illustrative. tool. It will-beseen from this construction and arrangement that a squeezing ofthefinger piece, 40,. so as to move its lower end toward the ,handle 12'of the tool, causes rearwardmotion of mally urges the lever 34 and thefinger piece .40 toward the" positions thereof shown in Figs. 1 and 2and thus it is interposed in a tensioned condition between thestationary arm 32 and the.link 38 adjacent the rear.end'of the latterso. as to exert a pulling force thereon.

In carrying out another aspect of the present invention, means isprovided for cutting the wire W that is loaded into the tool to apredetermined length. Such length being determined, in general, by theamount of wirerequired I in the formation of a predetermined number ofconvolu tions of the wire to be placed about the terminal T in.effecting connection of the wire to the terminal. In the presentinstance this means includes a pair of relatively movable cutting edgeswhich are disposed to cross one another in the movement of the sleeve 21with respect I to the bit 20, so as to shear the wire. Thus, one of thecutting edges is fixed with respect to the bit 20 and the other is fixedwith respect to the sleeve 21. In the illustrative tool the sleeve 21has mounted thereon adjacent its rear end a collar 45 which islongitudinally slotted as at 46 to define with the forward transverseface of the sleeve.

a cutting edge v48. The cutting edge 48 is disposed for.

cooperation with a cuttingedge 50 formed alongtheupper rear side of apin 52 which is fixed with respect to the bit 20 and .projects generallyradially therefrom through an elongated longitudinally disposed slot 53formed in the.

sleeve 21. Preferably the edge 50 is formed by chamfering the rear faceof the pin 52 so that the edge .50 extends 1 V outward and rearward fromthe bit 20. This construction.

disposes the edge 50 whereby the cutting edge 48 of the sleeve 45traverses it progressively from its outermost towards its innermost endas the sleeve 45 moves forward;

ly with respect thereto in the forward movement of the.

sleeve 21. To receive the pin 52 the bit 24 is transversely apertured asat 54 and a series of apertures 54, spaced longitudinally with respectto each other; are provided to permit alternative location of the pin 52andihuslof,

its cutting edge 50 whereby to permit adjustment of the length of-wireremaining loaded in the tool afterthe.

cutting operation. To retain the cutting edge 50-alined with respect tothe cutting edge 48, i.e., to prevent rotation of the pin 52, the outerend portion thereof is elongated and the-inner end of this elongatedportion is receivedin a channel 55 formed longitudinally in theoutersurface of the bit 20 and intersecting the outer ends of theapertures 54. The channel 55 is of a width correspondingto-that ofthepin 52 so that'its side walls engage the sides of the elongated'portionof the pin 52.

To provide access to the inner end of the pin 52'the; sleeve 21 has anopening 56 formed therein opposite the slot53 which opening permits theinsertion of a drift: pin-or the like against the innermost end of thepin 52v whereby the pincan be ejected from therespective'; ones Asshown, the sleeve 45 'is fixed inplacev uponthe by merelyloosening theset screw's the sleeve 45 may be i readily removed. This constructionalfeature together with the particular construction of the sleeve 45, ashere mbefore described, to define its cutting edge 48 permits thecutting edgeto be restored to a sharp condition by simply removing thesleeve andface-grinding it. Similarly, the cutting edge 50 of thepin 52can be restored by a with respect to the bit and prevents any relativerotary movement therebetween. Thus, maintenance of proper ahnement ofthe cutting edges 48 and 50 and of the positionin'g notch 29 of thesleeve 21 and the wire receiving groove 24 ofthe bit is insured.

As shown, the wire W is of the type commonly referred to as hookupwire," and it includes a conductor C having a covelingof insulation Ithereon. In accordancewith still another aspect of the presentinvention, means is pro vided for severing the insulation I and forstrippingit from the conductor C so as to bare the conductor for.apphcatlon to the terminal T to efiect an electrical connec- 7 tiontherebetween. More particularly, the present inven,'

tionnot only contemplates cutting of the insulation I at a point'spacedfrom the end of the wire W but additionally contemplates separatingthecut portions of the insulation so that severance of theinsulationiscomplete. Further,

the'invention contemplatesaccomplishing this end prior to mltiation ofthe winding operation to apply the conductor C to the terminal T.

In carrying out this aspect of the invention the forward or leading edgeof the sleeve 21 is utilized in, cooperation -with-"the forward endportion ofthebit 20,

in which the'groove24 is formedjand especially that portion thereof thatdefines the rear end of the groove 24.- As hereinbeforenotedthewirereceiving groove 24 is sized in transverse dimension to receive theconductor C of; the wire W, i.e., the groove 24-is complementally formedwith respect to the bare conductor C. It will be recalled from theforegoing description herein that upon forward movementof the sleeve 21from its r'earmostorloadingposition,its forward end'28 engages the wireW and moves it outwardly along the bit guide surface 27" andcircumferentially along the end 28 of the sleeve 21 toward the open rearend. of the wire receiving groove 24. Since the wire receiving groovecorresponds in transverse dimension to the diameter of the conductor C,the wire W with the insulation I thereon is prevented from dropping intothe groove 24.- Thus,

the lower edgeof'the sleeve 21 along the innermost edge of the notch 29,as indicated at 60, upon continued forward movement of the sleeve, bitesinto the insulation I, and=forces that portion of the insulationimmediately aheadof this edge forwardly. At the same time,isuch'continued forward motion of the sleeve 21 tends to force thelwireW intothe rear endof thewire receiving groove 24. ltwiil' be apparent fromanobservation of Figs. 2

and 6 that'upon relieving the bit 20 at 26 the forward end 'thereof wasprovided with arear surface 62 disposed transversely of the bit. Thisconstruction provides the'rearend of the wire receiving groove 24 withrela tively sharp edges 64. Since the groove is dimensioned to receiveonly the conductor C of thewire W the forcing downward of the wire Winto the rear end of the groove, upon forwardmovement of thewsleeve 21with respect to the bit 20, causes the side edges 64 to cut theinsulation I and leaves forward endof the severed portion of theinsulationin engagement with the transverse rear face 62 of the bit.Slight additional forwardlmovementof the sleeve 2 1wi'll, therefore,cause complete partingof the thus severed insulation.

As just above noted, the severed end portion of the insulation abuts thetransverse face 62 of the forward end portion of the bit 20 and isthusheld against forward movement as the sleeve 21' continues to moveforwardly. Further by virtue of its engagement with the wire W justahead of the insulation cut the sleeve 21 carries the wire W forwardlywith it. As a result the trailing portion of the conductor C of the wireW is withdrawn from the severed portion of the insulation I and at thesame time is pulled along the wire receiving groove 24 until the sleeve21reaches its forwardmost position as shown in Fig. 11. w t

The wire W is thus fully prepared for application to the terminal T whenthe latter is inserted in the terminal receiving recess 22 of the bit20. Upon initiation of rotation of the bit to wind the wire, or moreparticularly, the bared conductor C thereof, about the terminal T theconductor C is withdrawn forwardly or outwardly through thewirereceiving" groove 24. In sodoing the trailing '11, registers withtherelievedportion 26 of the bit 20.

To minimize the danger of damage to the conductor C as, for example, bynicking of the conductor by the bight portion of the rear end of thewire receiving groove 24 '"as' the wire is urged downwardly'into therear end of the groove, as-a result of the action of the forwardlymoving sleeve 21 thereon, the groove 24 adjacent its rear end isdeepened, as at 65, so as to'receive that portion of the insulation Ithat is disposed immediatelybeneath the point of contact with the wire Wof the cutting edge 60 of the sleeve121, Thisdeepeningof the groove 24iseffected to a depth substantially equal to the thickness'of theinsulation. With the'insulation I between this 'portionof the bottom of"the groove and-the conductor C, the latter is cushioned, i.e., thewireW is prevented from being forced against the lower rear edge portion ofthe groove 24-at that point. Thus, it is not likely tobe damaged. As aresult, the conductor is not weakened and is not likely to be broken asit is withdrawn through the Wire receiving groove 2'4 during thesubsequent winding operation wherein the conductor C is applied to theterminal T. I i

From the foregoing, therefore, it will be apparent that a toolconstructed and arranged in accordance with the teachings of the presentinvention permits of ready in- .sertion of a wire therein simply bylaying the wire across the bit with the sleeve in its retractedposition. Further, upon operation of'the device, relative movement isproduced between the bit and the sleeve whereby the end of the wire'.isutto the predetermined desired length. N

:The. wire is automatically positioned for reception in the wirereceiving groove, has its insulation severed and parted so that theinsulation is stripped from the end of the wires conductor as itiswithdrawn through the. wire receiving'groove of the bit and is woundabout and in intimate engagement with the terminals It is also apparentthat the cutting edges incorporated in the tool exemplifying the presentinvention are of durable form and can be readily resharpenedas mightbecome necessary; This latter can be accomplished simply by re- .movingand face-grinding the sleeve 45 and the 'pin 52 which provide theWire-cutting edges 48 and 50, and by i q J CPQ'PQ P SJ Q t e-iFP fl Q lm; s and arfiarigeiiient is of relatively:simple .fo%-requiring a min mum qr i di u l 9 mm.. ts-and;" achinii goper ations to formwthe same.Bythe same token thelsimplicityof the components and their inherentrugged 5 charaeter not only permits their economical manufacture.but;also permits thernijto be formed of minimum sizentherebylminimizing thetip: dimensions ofethe 1001; to :the/end that its utiiityis enhancedparticularly for applicationswhere space is at a premium.

Weclaim as our invention;

1. In a tool vfor \preparing and applying an insulated wire to aterminal by winding -the sarne about the ter minal, the combinationcomprising a bit adapted for r0 receiving reeess in the forwardend-thereof and a wire receiving groove spacediradially outward fromsaid reces s,- the bit being relieved intermediate its sends todefinethe rear, end of said groove and to provide the same withrelatively sharp rear vedges, a sleeve te lescoped. over said bit andmounted for longitudinal movement; wit l respect thereto, said sleevehaving a sharp front edge a first wire cutting edge fi ged on saidsleeve and a second wire cutting edge fixedwith respect to said bit anddisposed for cooperation with said first wire cut; ting edge,duringlongitudinal movement of. said sleeve \1 with respect to said bit, saidbit and said sleeve -having guide surfaces thereon for directingsaidwire towardsaid with respect to said bit, -said sleeve front edgebeing BOQ.

engag eab le withthe wire to bite into, its insula tionalid to 1 r a insdi ha grqgve e srfi r. to :wtv i s lation. d s e v flur n ju there qtwrd I it dina m em n t e Wi Q g 9 Y to Pa t e su a qa. .and;; .d.- ro v es b in pfctiv to. h d e 'l cve d i la o q t oa l inse vfiment with; theWi e s; t i W th rawn hr4fl 2, a 1- groove .up on rotation of said bitto wind the wire about 7 the, terminal whereby the conductor of the wireis 13311631 n m tefi e ntw ht r t allulu a tool. for-Preparing d app xzran; in u a ed. e 5 a minal; e.mb, n 2nr-.-sqm n a t g a W r w r m rmedi stre h lz, i e id r o es rm pqnd n vi w d h 1 s z ameten of, theconductor of the wire the bitbeing relieved intermediate it s end sitedefine the; rear end ofe i 9Y: and. o ,r pv de he. ns th ti y nn nedges, a d; a ev 1 =s P i Y a d o t. limp nt d r ud rnaltmov mqnt t repec qr o,; a s ev h v n har ntsd ea d m an for moving said sleevelongitudinally; with respectto said bit; with, the forward end of saidsleeve traversing Ih E fSUfXH-CIidF'POITfiQIi of said vbit, the forward.end 0f said sleev'ei front edge beingQengageable with the wire during.forward longitudinal movement.r thereof with re-. spect jtbgs'aidbit-toalbitelinto it sjinsiilation land to urge the: wire intolthe rearend ,of the, groove "andithe. insula tion against said sharpgroovefedgesso as' to cutthe inf. sulation, and said sleeve duringjfurthermforward' lo ngi H tudin'al movement urgingthe wirealong'.,,said groove as the forward endthereof;traversestherohtenfendlpdr I tion,,of,said, bitwith .said reargroove edgsrstraihihg. theicutfinsulation so. as to partth'eL'insulation 3.'fIn. a tool for prepa zing g and applyinglaninsnlated iaai k fi vi ia fi qbin ip -'wmPri nsV- bi '65; having a wirereceiving groovei forrned in its peripheral ete -1a t i. re nna j a w mee n q rof t u 1 b@ r ie ed lt r:v di -s d we d h a and g nsa do v I.

sltt y r yid ihc sam with-re tive y sharp ar.; d

a m mbe .nt imtcd ,f rqi n imd na r m vement i h r spect; t -,saidbi tso,as;totraverse saigi grooye, and; means for moving v; said. memberlongitudinally; with r'et spect to .nsaidu-bit said bitr and.saiclmember rhayingwguide t surfaces thereon coacting during forwardlongitudinalrecessruponarotationofsaid bit H H a 10 -withlth'e wireasthe wire is movedforwardly alon to ,said -bit urging the wire into therearofg said g groove, and its 1 insulation against saidsharp .grooveedges so as to cut the insulation and uponwcontinuedforwardlongitndinal-movement thereof to draw the wire-along said groovejto-part the insulation, said .rear groove. edge holding the severedinsulation portionagainst movemen said groove so as to .bare theconductor of th e wire;f orr intimate engagementwiththe terminal.

4.5111121 tool for preparing and applying ar -insulated wire to aterminal, the combination comprising a rotary-.

tationtwith-respect to the terminal andhavinga terminal 15 v ng a 7terminal i ,t -.f s

movement of said sleeve with respect to said bit for on ting said, wireto a predetermined length, and cutting meahsQ-respectively carried bysaid sleeve and; bit and engageable with the wireu in the forwardlongitnd ngl and separate the-ins l ationupon the wire-said sleeve duing i it sforward longitudinal movement further draw' the .wire alongsaid groove into PO Sl tlQItfOIf -aPPIQEiiQ to the. terminal uponrotation'of said bit.

5. Iris-a too 1 forpreparing and applying an insulated; wire'tolaterminal, the combination comprising. a rot bitnh avi ng v a terminalreceiving 1 recess. in the 7 forward I e11d,,.thereof and awirereceiving groove spaced iradiallyeout ward from said recess the bitbeing relieved; intermediate its ends to define the rear end ofsaidgroove 3 and to provide the same with relatively sha pgreanedges,

a sleeve teleseoped over said bit and mounted for longitudinalcmovementwith respect thereto, a men ber. on, said;;sleeve and spaced from theforward endathereof and providing a first wire cutting edge,- a secondmem- *the wire to urge the wire into the rearv endof said groove and theinsulationagainst said sharp groove edgeslupolii, relativetlongitiidinalmovement thereof was to. cu t lthe ins latior and -to move the wirealong said-groove 1:0,, part the insulation and position the conductorof the wire ;wit hin .said groove wherebyupon rotation of;said bit-thewire iswound about the terminal withrthe eon-n. duetor bated forintimate engagement. therewith.

6. In-a tool for preparingand applying aninsulated wire to a terminal,the combination comprising a ro t ary bit ihavingian internal,terminalreceivingrecess and. a wire receiving groove in the peripheralsurfacrelof the forward end portion thereof terminating inrspaced, re-i.lation to the forward enjdof said bit, said groovecorre: spending, inwidth to the diameter of ,thewires-tconr-h ductonand; corresponding indepth at the .forwa'rdnendt thereof to theirconductor diameterandubeingdeepenedr. at \the rearend thereof to correspond tothe..c"onductortv diameterjplus one 7 thickness of the..wiresinsu1ation,. means mounted for relative longitudinal movementswithn.respect .to said bit to traverse. said groove, said means being-arranged.to engage thewireduring its relativefor ward movement with respectrtosaid bit to pressv the" wire into the rear end of the groovelto cuttheinsulation upon said ;wire.and during continued forward longituydinalrnovement thereof'with respect to said bit-:to -furthendra'wmthewire along said groove separating the insulatio'nand moving the baredconductor of the wire into. 7 positionrforapplication .to 'a terminalreceivedv in saidrzf,

7. A tool for preparing and applying an insulated wire to a terminal,the combination comprising a rotary bit having a terminal receivingrecess in the forward end thereof and a longitudinally disposed wirereceiving groove formed in the peripheral surface thereof adjacent itsforward end, said bit being relieved intermediate its ends to provide atransverse face defining the rear end of said groove and providing thesame with relatively sharp rear edges, a sleeve telescoped over said bitand mounted for longitudinal movement with respect thereto, said sleevehaving a longitudinal slot in one side thereof, a pin projectingoutwardly from said bit through said slot and having a cutting edgethereon, a member fixed with respect to said sleeve and defining acutting edge disposed for cooperation with the cutting edge of said pinupon longitudinal movement of said sleeve With respect to said bit, andmeans for moving said sleeve from a normally retracted position whereinthe relieved portion of saidbit is exposed for the reception of the wireto a forward position wherein the forward end of said sleeve traversessaid bit and the groove therein, said sleeve being arranged to engagethe wire as an incident to its forward movement to press the wireagainst the sharp groove edges so as to cut the wires insulation, saidsleeve drawing said wire along said groove upon further forward movementthereof with respect to said bit to part said insulation and to draw thewires bared conductor along said groove into position for application toa terminal received in said recess upon rotation of said bit.

8. A tool for preparing and connecting an insulated Wire to a terminalcomprising, in combination, a body housing a motor, a bit for windingthe wire about the terminal and comprising a generally cylindricalmember journaled for rotation in said body and drivingly connected tosaid motor, said bit having an internal terminal receiving recess in theouter end thereof and having a wire receiving groove in its peripheralsurface adjacent the outer end thereof, a sleeve disposed about said bitand mounted for relative longitudinal movement with respect thereto,means for moving said bit longitudinally with respect to said sleevebetween a retracted position wherein the forward end of said bit and itswire receiving groove are exposed and a forward position wherein theforwardend of said sleeve traverses the ltl forward end of said bit andwire receiving groove, and means mounted on said sleeve and said bit andoperative during forward longitudinal movement of said sleeve withrespect to said bit for cutting said wire to a predetermined length,said sleeve being arranged to engage said wire during its forwardmovement to move said wire toward and along said groove, and said sleeveand said bit cooperating during forward movement of the former withrespect to the latter both to cut and to part the wires insulation andadditionally to position the wires bared conductor for application to aterminal received in said recess.

9. In a tool for preparing and applying an insulated wire to a terminal,the combination comprising a rotary bit having a terminal receivingrecess in its forward end and having an elongated longitudinallydisposed wire receiving groove in the peripheral surface of its outerend portion corresponding in width to the conductor of the wire, saidbit being transversely relieved to define the inner end of said grooveand toprovide the same with sharp rear edges, a sleeve mounted forlongitudinal movement with respect to said bit between a retractedposition wherein the forward end portion of the bit is exposed and aforward position with the forward end of the sleeve traversing theforward end portion of the bit during such movement, said bit having aguide surface thereon adjacent the rear end of said groove which surfaceis exposed when said sleeve is in its retracted position to receive awire laid thereacross, the forward end of said sleeve being engageablewith the wire during its forward longitudinal movement and coacting withsaid guide surface to direct the wire into the .rear end of said grooveand to urge the wires insulation against the sharp groove edges so as tocut the insulation, said groove edges holding the severed insulationportion against movement with the wire as the wire is moved forwardlyalong said groove by said sleeve whereby to bare the wires conductor forintimate engagement with a terminal received in said recess uponrotation of said bit.

References Cited inthe file of this patent UNITED STATES PATENTS2,682,063 Miloche June 29, 1954

